/*
 * Copyright (c) 1999 - 2005 NetGroup, Politecnico di Torino (Italy)
 * Copyright (c) 2005 - 2007 CACE Technologies, Davis (California)
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the Politecnico di Torino, CACE Technologies
 * nor the names of its contributors may be used to endorse or promote
 * products derived from this software without specific prior written
 * permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 */

/** @ingroup packetapi
 *  @{
 */

/** @defgroup packet32h Packet.dll definitions and data structures
 *  Packet32.h contains the data structures and the definitions used by packet.dll.
 *  The file is used both by the Win9x and the WinNTx versions of packet.dll, and can be included
 *  by the applications that use the functions of this library
 *  @{
 */

#ifndef __PACKET32
#define __PACKET32

#include <winsock2.h>

#ifdef HAVE_AIRPCAP_API
    #include <airpcap.h>
#else
    #if !defined (AIRPCAP_HANDLE__EAE405F5_0171_9592_B3C2_C19EC426AD34__DEFINED_)
        #define AIRPCAP_HANDLE__EAE405F5_0171_9592_B3C2_C19EC426AD34__DEFINED_
typedef struct _AirpcapHandle* PAirpcapHandle;
    #endif /* AIRPCAP_HANDLE__EAE405F5_0171_9592_B3C2_C19EC426AD34__DEFINED_ */
#endif /* HAVE_AIRPCAP_API */

#ifdef HAVE_DAG_API
    #include <dagc.h>
#endif /* HAVE_DAG_API */

// Working modes
#define PACKET_MODE_CAPT 0x0 ///< Capture mode
#define PACKET_MODE_STAT 0x1 ///< Statistical mode
#define PACKET_MODE_MON 0x2 ///< Monitoring mode
#define PACKET_MODE_DUMP 0x10 ///< Dump mode
#define PACKET_MODE_STAT_DUMP MODE_DUMP | MODE_STAT ///< Statistical dump Mode


/// Alignment macro. Defines the alignment size.
#define Packet_ALIGNMENT sizeof(int)
/// Alignment macro. Rounds up to the next even multiple of Packet_ALIGNMENT.
#define Packet_WORDALIGN(x) (((x) + (Packet_ALIGNMENT - 1)) & ~(Packet_ALIGNMENT - 1))

#define NdisMediumNull -1       ///< Custom linktype: NDIS doesn't provide an equivalent
#define NdisMediumCHDLC -2      ///< Custom linktype: NDIS doesn't provide an equivalent
#define NdisMediumPPPSerial -3  ///< Custom linktype: NDIS doesn't provide an equivalent
#define NdisMediumBare80211 -4  ///< Custom linktype: NDIS doesn't provide an equivalent
#define NdisMediumRadio80211 -5     ///< Custom linktype: NDIS doesn't provide an equivalent
#define NdisMediumPpi -6        ///< Custom linktype: NDIS doesn't provide an equivalent

// Loopback behaviour definitions
#define NPF_DISABLE_LOOPBACK 1      ///< Drop the packets sent by the NPF driver
#define NPF_ENABLE_LOOPBACK 2       ///< Capture the packets sent by the NPF driver

/*!
   \brief Network type structure.

   This structure is used by the PacketGetNetType() function to return information on the current adapter's type and speed.
 */
typedef struct NetType
{
    UINT LinkType;  ///< The MAC of the current network adapter (see function PacketGetNetType() for more information)
    ULONGLONG LinkSpeed;    ///< The speed of the network in bits per second
} NetType;


//some definitions stolen from libpcap

#ifndef BPF_MAJOR_VERSION

/*!
   \brief A BPF pseudo-assembly program.

   The program will be injected in the kernel by the PacketSetBPF() function and applied to every incoming packet.
 */
struct bpf_program
{
    UINT bf_len;                ///< Indicates the number of instructions of the program, i.e. the number of struct bpf_insn that will follow.
    struct bpf_insn* bf_insns;  ///< A pointer to the first instruction of the program.
};

/*!
   \brief A single BPF pseudo-instruction.

   bpf_insn contains a single instruction for the BPF register-machine. It is used to send a filter program to the driver.
 */
struct bpf_insn
{
    USHORT code;        ///< Instruction type and addressing mode.
    UCHAR jt;           ///< Jump if true
    UCHAR jf;           ///< Jump if false
    int k;              ///< Generic field used for various purposes.
};

/*!
   \brief Structure that contains a couple of statistics values on the current capture.

   It is used by packet.dll to return statistics about a capture session.
 */
struct bpf_stat
{
    UINT bs_recv;       ///< Number of packets that the driver received from the network adapter
                        ///< from the beginning of the current capture. This value includes the packets
                        ///< lost by the driver.
    UINT bs_drop;       ///< number of packets that the driver lost from the beginning of a capture.
                        ///< Basically, a packet is lost when the the buffer of the driver is full.
                        ///< In this situation the packet cannot be stored and the driver rejects it.
    UINT ps_ifdrop;     ///< drops by interface. XXX not yet supported
    UINT bs_capt;       ///< number of packets that pass the filter, find place in the kernel buffer and
                        ///< thus reach the application.
};

/*!
   \brief Packet header.

   This structure defines the header associated with every packet delivered to the application.
 */
struct bpf_hdr
{
    struct timeval bh_tstamp;   ///< The timestamp associated with the captured packet.
                                ///< It is stored in a TimeVal structure.
    UINT bh_caplen;             ///< Length of captured portion. The captured portion <b>can be different</b>
                                ///< from the original packet, because it is possible (with a proper filter)
                                ///< to instruct the driver to capture only a portion of the packets.
    UINT bh_datalen;            ///< Original length of packet
    USHORT bh_hdrlen;           ///< Length of bpf header (this struct plus alignment padding). In some cases,
                                ///< a padding could be added between the end of this structure and the packet
                                ///< data for performance reasons. This filed can be used to retrieve the actual data
                                ///< of the packet.
};

/*!
   \brief Dump packet header.

   This structure defines the header associated with the packets in a buffer to be used with PacketSendPackets().
   It is simpler than the bpf_hdr, because it corresponds to the header associated by WinPcap and libpcap to a
   packet in a dump file. This makes straightforward sending WinPcap dump files to the network.
 */
struct dump_bpf_hdr
{
    struct timeval ts;          ///< Time stamp of the packet
    UINT caplen;                ///< Length of captured portion. The captured portion can smaller than the
                                ///< the original packet, because it is possible (with a proper filter) to
                                ///< instruct the driver to capture only a portion of the packets.
    UINT len;                   ///< Length of the original packet (off wire).
};


#endif

struct bpf_stat;

#define        DOSNAMEPREFIX TEXT("Packet_")    ///< Prefix added to the adapters device names to create the WinPcap devices
#define        MAX_LINK_NAME_LENGTH 64          //< Maximum length of the devices symbolic links
#define        NMAX_PACKET 65535

/*!
   \brief Addresses of a network adapter.

   This structure is used by the PacketGetNetInfoEx() function to return the IP addresses associated with
   an adapter.
 */
typedef struct npf_if_addr
{
    struct sockaddr_storage IPAddress;  ///< IP address.
    struct sockaddr_storage SubnetMask; ///< Netmask for that address.
    struct sockaddr_storage Broadcast;  ///< Broadcast address.
} npf_if_addr;


#define ADAPTER_NAME_LENGTH 256 + 12    ///<  Maximum length for the name of an adapter. The value is the same used by the IP Helper API.
#define ADAPTER_DESC_LENGTH 128         ///<  Maximum length for the description of an adapter. The value is the same used by the IP Helper API.
#define MAX_MAC_ADDR_LENGTH 8           ///<  Maximum length for the link layer address of an adapter. The value is the same used by the IP Helper API.
#define MAX_NETWORK_ADDRESSES 16        ///<  Maximum length for the link layer address of an adapter. The value is the same used by the IP Helper API.


typedef struct WAN_ADAPTER_INT WAN_ADAPTER; ///< Describes an opened wan (dialup, VPN...) network adapter using the NetMon API
typedef WAN_ADAPTER* PWAN_ADAPTER; ///< Describes an opened wan (dialup, VPN...) network adapter using the NetMon API

#define INFO_FLAG_NDIS_ADAPTER 0        ///< Flag for ADAPTER_INFO: this is a traditional ndis adapter
#define INFO_FLAG_NDISWAN_ADAPTER 1     ///< Flag for ADAPTER_INFO: this is a NdisWan adapter, and it's managed by WANPACKET
#define INFO_FLAG_DAG_CARD 2            ///< Flag for ADAPTER_INFO: this is a DAG card
#define INFO_FLAG_DAG_FILE 6            ///< Flag for ADAPTER_INFO: this is a DAG file
#define INFO_FLAG_DONT_EXPORT 8         ///< Flag for ADAPTER_INFO: when this flag is set, the adapter will not be listed or openend by winpcap. This allows to prevent exporting broken network adapters, like for example FireWire ones.
#define INFO_FLAG_AIRPCAP_CARD 16       ///< Flag for ADAPTER_INFO: this is an airpcap card
#define INFO_FLAG_NPFIM_DEVICE 32

/*!
   \brief Describes an opened network adapter.

   This structure is the most important for the functioning of packet.dll, but the great part of its fields
   should be ignored by the user, since the library offers functions that avoid to cope with low-level parameters
 */
typedef struct _ADAPTER
{
    HANDLE hFile;               ///< \internal Handle to an open instance of the NPF driver.
    CHAR SymbolicLink[MAX_LINK_NAME_LENGTH];  ///< \internal A string containing the name of the network adapter currently opened.
    int NumWrites;              ///< \internal Number of times a packets written on this adapter will be repeated
                                ///< on the wire.
    HANDLE ReadEvent;           ///< A notification event associated with the read calls on the adapter.
                                ///< It can be passed to standard Win32 functions (like WaitForSingleObject
                                ///< or WaitForMultipleObjects) to wait until the driver's buffer contains some
                                ///< data. It is particularly useful in GUI applications that need to wait
                                ///< concurrently on several events. In Windows NT/2000 the PacketSetMinToCopy()
                                ///< function can be used to define the minimum amount of data in the kernel buffer
                                ///< that will cause the event to be signalled.

    UINT ReadTimeOut;           ///< \internal The amount of time after which a read on the driver will be released and
                                ///< ReadEvent will be signaled, also if no packets were captured
    CHAR Name[ADAPTER_NAME_LENGTH];
    PWAN_ADAPTER pWanAdapter;
    UINT Flags;                 ///< Adapter's flags. Tell if this adapter must be treated in a different way, using the Netmon API or the dagc API.

    #ifdef HAVE_AIRPCAP_API
    PAirpcapHandle AirpcapAd;
    #endif // HAVE_AIRPCAP_API

    #ifdef HAVE_NPFIM_API
    void* NpfImHandle;
    #endif // HAVE_NPFIM_API

    #ifdef HAVE_DAG_API
    dagc_t* pDagCard;           ///< Pointer to the dagc API adapter descriptor for this adapter
    PCHAR DagBuffer;            ///< Pointer to the buffer with the packets that is received from the DAG card
    struct timeval DagReadTimeout;  ///< Read timeout. The dagc API requires a timeval structure
    unsigned DagFcsLen;         ///< Length of the frame check sequence attached to any packet by the card. Obtained from the registry
    DWORD DagFastProcess;       ///< True if the user requests fast capture processing on this card. Higher level applications can use this value to provide a faster but possibly unprecise capture (for example, libpcap doesn't convert the timestamps).
    #endif // HAVE_DAG_API
} ADAPTER, * LPADAPTER;

/*!
   \brief Structure that contains a group of packets coming from the driver.

   This structure defines the header associated with every packet delivered to the application.
 */
typedef struct _PACKET
{
    HANDLE hEvent;              ///< \deprecated Still present for compatibility with old applications.
    OVERLAPPED OverLapped;      ///< \deprecated Still present for compatibility with old applications.
    PVOID Buffer;               ///< Buffer with containing the packets. See the PacketReceivePacket() for
                                ///< details about the organization of the data in this buffer
    UINT Length;                ///< Length of the buffer
    DWORD ulBytesReceived;          ///< Number of valid bytes present in the buffer, i.e. amount of data
                                    ///< received by the last call to PacketReceivePacket()
    BOOLEAN bIoComplete;        ///< \deprecated Still present for compatibility with old applications.
} PACKET, * LPPACKET;

/*!
   \brief Structure containing an OID request.

   It is used by the PacketRequest() function to send an OID to the interface card driver.
   It can be used, for example, to retrieve the status of the error counters on the adapter, its MAC address,
   the list of the multicast groups defined on it, and so on.
 */
struct _PACKET_OID_DATA
{
    ULONG Oid;                  ///< OID code. See the Microsoft DDK documentation or the file ntddndis.h
                                ///< for a complete list of valid codes.
    ULONG Length;               ///< Length of the data field
    UCHAR Data[1];              ///< variable-lenght field that contains the information passed to or received
                                ///< from the adapter.
};
typedef struct _PACKET_OID_DATA PACKET_OID_DATA, * PPACKET_OID_DATA;

#ifdef __cplusplus
extern "C" {
#endif

/**
 *  @}
 */

/*
   BOOLEAN QueryWinPcapRegistryStringA(CHAR *SubKeyName,
                                 CHAR *Value,
                                 UINT *pValueLen,
                                 CHAR *DefaultVal);

   BOOLEAN QueryWinPcapRegistryStringW(WCHAR *SubKeyName,
                                 WCHAR *Value,
                                 UINT *pValueLen,
                                 WCHAR *DefaultVal);
 */

//---------------------------------------------------------------------------
// EXPORTED FUNCTIONS
//---------------------------------------------------------------------------

PCHAR __cdecl PacketGetVersion();
PCHAR __cdecl PacketGetDriverVersion();
BOOLEAN __cdecl PacketSetMinToCopy(LPADAPTER AdapterObject, int nbytes);
BOOLEAN __cdecl PacketSetNumWrites(LPADAPTER AdapterObject, int nwrites);
BOOLEAN __cdecl PacketSetMode(LPADAPTER AdapterObject, int mode);
BOOLEAN __cdecl PacketSetReadTimeout(LPADAPTER AdapterObject, int timeout);
BOOLEAN __cdecl PacketSetBpf(LPADAPTER AdapterObject, struct bpf_program* fp);
BOOLEAN __cdecl PacketSetLoopbackBehavior(LPADAPTER AdapterObject, UINT LoopbackBehavior);
INT __cdecl PacketSetSnapLen(LPADAPTER AdapterObject, int snaplen);
BOOLEAN __cdecl PacketGetStats(LPADAPTER AdapterObject, struct bpf_stat* s);
BOOLEAN __cdecl PacketGetStatsEx(LPADAPTER AdapterObject, struct bpf_stat* s);
BOOLEAN __cdecl PacketSetBuff(LPADAPTER AdapterObject, int dim);
BOOLEAN __cdecl PacketGetNetType(LPADAPTER AdapterObject, NetType* type);
LPADAPTER __cdecl PacketOpenAdapter(PCHAR AdapterName);
BOOLEAN __cdecl PacketSendPacket(LPADAPTER AdapterObject, LPPACKET pPacket, BOOLEAN Sync);
INT __cdecl PacketSendPackets(LPADAPTER AdapterObject, PVOID PacketBuff, ULONG Size, BOOLEAN Sync);
LPPACKET __cdecl PacketAllocatePacket(void);
VOID __cdecl PacketInitPacket(LPPACKET lpPacket, PVOID Buffer, UINT Length);
VOID __cdecl PacketFreePacket(LPPACKET lpPacket);
BOOLEAN __cdecl PacketReceivePacket(LPADAPTER AdapterObject, LPPACKET lpPacket, BOOLEAN Sync);
BOOLEAN __cdecl PacketSetHwFilter(LPADAPTER AdapterObject, ULONG Filter);
BOOLEAN __cdecl PacketGetAdapterNames(PTSTR pStr, PULONG BufferSize);
BOOLEAN __cdecl PacketGetNetInfoEx(PCHAR AdapterName, npf_if_addr* buffer, PLONG NEntries);
BOOLEAN __cdecl PacketRequest(LPADAPTER AdapterObject, BOOLEAN Set, PPACKET_OID_DATA OidData);
HANDLE __cdecl PacketGetReadEvent(LPADAPTER AdapterObject);
BOOLEAN __cdecl PacketSetDumpName(LPADAPTER AdapterObject, void* name, int len);
BOOLEAN __cdecl PacketSetDumpLimits(LPADAPTER AdapterObject, UINT maxfilesize, UINT maxnpacks);
BOOLEAN __cdecl PacketIsDumpEnded(LPADAPTER AdapterObject, BOOLEAN sync);
BOOL __cdecl PacketStopDriver();
VOID __cdecl PacketCloseAdapter(LPADAPTER lpAdapter);
BOOLEAN __cdecl PacketStartOem(PCHAR errorString, UINT errorStringLength);
BOOLEAN __cdecl PacketStartOemEx(PCHAR errorString, UINT errorStringLength, ULONG flags);
PAirpcapHandle __cdecl PacketGetAirPcapHandle(LPADAPTER AdapterObject);

//
// Used by PacketStartOemEx
//
#define PACKET_START_OEM_NO_NETMON 0x00000001

#ifdef __cplusplus
}
#endif

#endif //__PACKET32